Oil-fuel burner.



6.0. M. BENNETT & s. H. SMlTH.

OIL FUEL QURNER.

APPucmoN FILEDYJcTI- I. 1913:

Patented June 22, 1915.

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-C. G. MrBENNETT & SI H. SMITH. 0H. FUEL BURNER. APPLICATION FILED ocr. 11.19131 Patented June 22, 1915.

a m Ill/mm WQr/fi p a W I llivrl z To all whom it may concern with a spindle sleeve extending burner casing, the interior 0 cYnIn ononen amen nnnnnrr, or 'Lo'NnomnNn SYDNEY, seesaw. stairs, or

' wnsrr EALING, ENGLAND, assrcnons 'ro smoxnnnss nconomsnns LIMITED, or

LONDGN, ENGLAND. o

inseam.

Be it known that we, CYRJI GEORGE Mim- GHA BENNETT, a subject of the King of Great Britain, residing at 112 Holland road, I

in the county of London, England, and SYD- NEY HERBERT SMITH, a subject of the King of Great Britain, residing at 24 Bradley Gardens, .lVest Ealing, in the county of Middlesex, England, have invented new and use ful Improvements in Oil-Feel Burners, of which the following is a specificationi- Our invention relates tooil fuel burners designed more particularly for burning heavy oils and capable of being easily fitted to existing coal furnaces and applicahle jar- "ticul'arly for usewith those furnaces W ere chain gratestokers are used and Where refractoriy arches are used in the construction ofthe combustion chamhen p Our invention is characterized by a a cam jacketed burner so constructed that the, steam forming the" steam jetof; the burner first enters the jacket passing all around an annular space which surrounds "the outer shell of an oil'chamber and thereby heating the'oil contained therein and 'then passes out 1 of the jacket and again reenters the burner through a steam ipe which is carried through an air chain or formed by theouter extremity of said burner, to a central circalar chamber surrounded bysaid oil chamber and steam jacket where the end of said steam pipe is converted into a'steam nozzle. Inthe border of our invention the same steam first heats the oil and then the airentering the centralchamher in said burner frong its exterior end and thus provides, for an a 1 lute uniformity of temperature of the a'ir steam and oil at the burnermouth. The steam jacketed oil fuel burner of-our invention comprises a hollowpil controlling valve beyond the said sleeve formingthe assage for an interior. air sup-- ply induced 8y a steam jet-mounted in such' a position in said sleeve to give an adequate supply of airxnixedwith steam with a high velocity before reaching the ignition point of the burner. r a Ourinvention is illustrated-by way of ex ample in the accompanying drawings, in which w V Figure 1 shows a sectional elevation .of the burner. ig; 2 shows a front elevation. Fig. 3 shows a section on the line AB lookdin-FUEL nomina specification of Letters Patent. Patented June 22, 1915, i Application and October 11, i

leis. Serial-No. 794,332.

ing fitted in the wall 4% of the furnace as and Fig. 5 shows shown in Figs. 1 and 2 conveniently above the front arch by means of the stays 6, the free extremities of which are bolted to the'lugs i proecting from the sides of said burner, shown in Fig; 4:.

As shown more "particularly in Fi i and {hthe burner comprises a hollow cylindrical casing 1 adapted to form a steam jacket on circling an oil reservoir Qsurroundin a' circular chamber 3 in the center of the urner.

The said oil reservoir 2 isadapted to receive oil from a tank (not shown) preferably placed on top of'the burner head to allow the 'oil to-flow the burner mounted on the front wall 4: of said furnace through a connection 5 shown in Fig. 2. 'The inner wall of said reservoir 2 is formed by a longitudinallymovable sleeve 8 provided at its extremity with a flange 9 in which is arranged a series of slots 10 as shown more particularly in Figs; ,e 1 and 5, if the burner is to he used for thick adapted to he with sufiicient freely down to' a oil. The'oilis adapted to pass out throughsaid slots 10 against the conical inner face of aninwardly turned lip 11- of said burner ,casing 1 forming the mouth of the burner. The conical outer surface 1 of said slotted flange 9 at the extremity of the oilreservoir so- 2 is adapted to engage with the conical inner face of said lip 11 and for-ins therewith an oil valve and its seating The slots -10 through the flange or valve head 9 allow the oil to pass freely in fine jets against the Inner face of said lip 11, thus forming a film-0f oil the outletof which at the-burner mouth is controlled by. the space between the surfaces of said flange or valve head and lip. The said sleeve 8 is screwediinto the interior ofthe burner casing and is cape bleof longitudlnal adjustment by means of beyond saidlourncr casing. By this arrangethe hand wheel 12 mounted on said sleevem ing formed by the inner conical face of. the.

lip 11 and although the oil is heated to the proper temperatures .by the super-heats up by the carbonizing of the oil. tity ofo jl spray ejected by the burner is controlledd oiithe slots in said flaiige or valve head so that the area of said valve slots. need not be steam surrounding the oil reservoir there is little possibility of said slots being he quan- 32' said oil valve and notby the-size limited to the maximum dischar e required. If therefore, one or more he es become blocked up the valve can be easily adjusted so that there is an ample amount ofoil dis'' charged to keep the burner going The exterior face 13 of said lip is preferably bell mouthed as shown in Fig. 1. e steam is taken from any-convenient place and is conveniently of the same pressure as the steam in the boiler. The steam enters the burner casing 1 through the inlet 122 from the steam pipe 133 which is provided with a steamcock 14: as shown iinhFig. 2; From the inlet 122 the steam passes through the'hollow interior-15.of the casing wluch'thus-forms a steam jacket surrounding and heating up to the temperature o f'the steam, the oil con tained in the oil reservoir 2. From the steam jacket 15 the steam-passesout through the outlet 16 and steam pipe 17 to an outlet jetof high velocity is induced in the central.

lat the end of said steam pipe, said outlet being formed into a fine nozzle 18, whereby a circular chamber 3- of the burner which is surrounded by said oil reservoir 2 as shown I in Figs. 1 and 4 of the drawings.v The said pipe 17 passes through the conical air chamber 20 arranged at the outer extremity of the burner as shownin Figs. 1' and 2. As shown in Fig. 1 the said conical-air .chamber 20 is mounted on the exterior end of the sleeve forming the oil reservoir" 2 and oil valve as above described. The inner end of said air chamber 20 is provided with a series of air holes 21 adapted totbe moved mor out ofregister with a corre-.

sponding series of air holes 22 "formed in a flange 23'projecting from saidpipe 17, said" .fl-ange being adapted to close the exterior end of the chamber 3-surrounded by the saidsleeve 8 forming the oil reservoir and within which sleeve 8 the steam nozzle 18 of high velocity is'arranged. As shown in Fig. 1

we prefer to arrangeadditional air holes 24 in the bodv'of said sleeve adapted to be.

opened or closed by the overlapping flange 25 of said air chamber 20 which is provided with corresponding air holes 26.

The steam first entersvthe jacket 15 pass-'- ing all around the exteriorsurface of the oil reservoir 2 and thus heating the oil contained therein to its own temperature-be! fore passinga ut of said acket throughthe outlet 16 an steam pipe 17 by which it is carried throughthe air chamber 20 to the steam no'zzle'a't the end of said pipe 17 mounted in the central circular chamber of said burner enc rcledhv said 011 reservo r blocked and steam jacket. By this arrangement the samesteamheats the'oil and-then the/air ventering the central circular chamber through the conical air chamber 20 and thus gives absolute uniformity of vtemperature in the final mixture of air,'steam and oil burnt at the mouth of the burner; The said steam nozzle 18 is mounted in the said circular chamber 3 in such a position that the cone of steam passing from the nozzle ex pends in diameter until on reaching the urner'mouth it corres onds indiameter' 1 with that of the enlarge end of 'the conical valve seatand thus carries away the whole film 01 oil which' is allowed to escapefrom said valve.

The oil r1161 has of our invention has a controlled air supply which passes straight through the.burner from end toend withw out anglesor bends, thus tending to increase the'final velocity of the mixture of-steam 1 and air; I

The'a ction of the steamjet is to create vacuum in the central circular chamber?) and bymeans of the air holes the air rushes 7 into said space after being heated in the conical chamber 20 and finally by the steam itselfand. is thoroughly mixed with the I steam before reaching the 'point of ignition at the mouth 'oftthe burner. The velocity of the air. is considerably increased by the cone 1 shaped chamber 20. The oil after being to ahigh temperature by the brought u steam jac et is discharged in fine jets against the conical valve seat 11, the result being that the combined hot air and steam jet effectively mixes with the film of oil as,

e burner it is 'discharged at the mouth of and, carries it along to the point of ignition in the furnace combustion chamber.

Owing to the air chamber 20 being capable of adjustment so as to move the paired air holes 21 and22524' and 26 more or i'nor out; of register the amount of air 'en- "teringthe circular chamber 3 is controlled.

At theendof the burner casingwe may.

arrange" a loose fitting sleeve 30, the end of which is coned to' register with the coneface 32 on the plate 4 around the burner aperture 31 in said pl-te and form with said face 32 an air valve, by which means the outside air within said casing concentric Withsaid outer casing and said steam jacket, andhaving a" forwardly extending portionvform ng a hollow' oil corit olling'valve, an air chamber at the-exterior 'ehd 'of. the burner, ace'ntral 1 airchambe'rinsaid burner surrounded by Rsaid oil reservoir,- a steam noazle mounted in said air cham er andan outlet steampip e messes leading from said steam jacketthrough said air chamber is steam nozzle.

A steam jacketed eiifuel burner oomprising a, steam eeket,e spindle sleeve extenciing beyeiici the steam jacket, en sir chamber 350.. an interior air supply formeii by the interim of said sleeve, e pipe extending longiteflinaily through said air chamber said adapted 60 heat said air by re,- liation a steam nozzle mountefi in said sleeve at the'end of said steam ipe 01- inducing said air supgsly, and means for conveying the steam fl om she steam jacket to said radiating steam pipe.

3. A steam jacketed oil fuel burner, oomprisi e steam jacket having a valve seat, e iiollew oil centrolling valve cooperating therewith, a syindle sleeve formei by an extension of said oil valve and extending beyond the steam jacket, a passage for an interior air supply formed by the interior of said sleeve n steam pipe eciapted to heat said air supply by radiation, a steam nozzle at the and of said steam pipe for inducing said air supply, a conical air chamber rotstably mounted at the exterior end of said spindle sleeve, and means controlled by the rotation of said chamber for geverning the supply of air $0 the interior of said spindie sleeve.

41. A steam ja-cke ed oii fuel burner comprising in combination, a furnace plate proifiefi with a burner opening having an outwerdly fiere conical Well, a steam jacket, an annular oii reserveir having an inner well formed as e iongitudjeeily movable sleeve the end of which coiinerstes with the end of the steam jacket e0 arm a burner opening,

and a longitudinally adjustable member soopereting with said burner and provided with a, conical end por'izien ceiipereting with (HRH.- EGEGE amass BENNETT. SYDNEY @EBERT SETH- fifi'ti essesz Lemmas E, Keynes, 0. J. Wows. 

